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Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2017 | Mar. 31, 2017 | Dec. 30, 2016 | Jun. 30, 2017
Miscellaneous Other Non-current Assets |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
Restricted investments |  | $ 7.7 |  |
Employee loans receivable |  | 2.2 |  |
Selling, General and Administrative Expense |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
One-time, non-cash benefit |  | $ 9.9 |  |
Goodwill Adjustment |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
Adjustment of financial statements line item |  |  | $ 209.9 |
Accumulated Other Comprehensive Income Adjustment |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
Adjustment of financial statements line item |  |  | 209.9 |
Overall Translation Adjustment |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
Adjustment of financial statements line item |  |  | $ 287.5 |
Other Comprehensive Income Adjustment |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |
Adjustment of financial statements line item | $ 39.6 |  |  | $ 41.9

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